package com.cust.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.cust.sky.constant.MessageConstant;
import com.cust.sky.constant.OrderConstant;
import com.cust.sky.context.BaseContext;
import com.cust.sky.dto.*;
import com.cust.sky.entity.*;
import com.cust.sky.exception.AddressBookBusinessException;
import com.cust.sky.exception.OrderBusinessException;
import com.cust.sky.exception.ShoppingCartBusinessException;
import com.cust.sky.mapper.OrdersMapper;
import com.cust.sky.service.*;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.cust.sky.utils.HttpClientUtil;
import com.cust.sky.utils.WeChatPayUtil;
import com.cust.sky.vo.OrderPaymentVO;
import com.cust.sky.vo.OrderStatisticsVO;
import com.cust.sky.vo.OrderSubmitVO;
import com.cust.sky.vo.OrderVO;
import com.cust.sky.websocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;


/**
 * <p>
 * 订单表 服务实现类
 * </p>
 *
 * @author lei
 * @since 2024-07-10
 */
@Service
public class OrderServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrderService {

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private OrderDetailService orderDetailService;

    @Autowired
    private UserService userService;

    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Autowired
    private WebSocketServer webSocketServer;

    //百度地图接口请求地址
    public static final String URL = "https://api.map.baidu.com/geocoding/v3";
    //线路规划请求接口
    public static final String ROUTE_URL = "https://api.map.baidu.com/directionlite/v1/driving";

    @Value("${sky.shop.address}")
    private String shopAddress;

    @Value("${sky.baidu.ak}")
    private String ak;

    /**
     * 用户下单
     *
     * @param orderSubmitDTO
     * @return
     */
    @Transactional
    @Override
    public OrderSubmitVO submitOrder(OrderSubmitDTO orderSubmitDTO) {
        //处理业务异常（地址簿为空、购物车数据为空）
        AddressBook addressBook = addressBookService.getById(orderSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            //抛出业务异常
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //检查用户的收货地址是否超出配送范围
        checkOutOfRange(addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail());

        //查询当前用户的购物车数据
        Long userId = BaseContext.getCurrentId();
        List<ShoppingCart> shoppingCartList = shoppingCartService.getShoppingCartByUserId(userId);

        if (CollectionUtils.isEmpty(shoppingCartList)) {
            //抛出业务异常
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //向订单表插入一条数据
        Orders order = new Orders();
        BeanUtils.copyProperties(orderSubmitDTO, order);
        order.setPayStatus(OrderConstant.UN_PAID);
        order.setStatus(OrderConstant.PENDING_PAYMENT);
        //订单号
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setAddress(addressBook.getDetail());
        order.setPhone(addressBook.getPhone());
        order.setConsignee(addressBook.getConsignee());
        order.setUserId(userId);
        order.setOrderTime(LocalDateTime.now());
        baseMapper.insert(order);

        List<OrderDetail> orderDetailList = new ArrayList<>();
        //向订单明细表插入n条数据
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();//订单明细
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(order.getId());//设置当前订单明细关联的订单id
            orderDetailList.add(orderDetail);
        }
        orderDetailService.saveBatch(orderDetailList);

        //清空当前用户的购物车数据
        shoppingCartService.deleteByUserId(userId);

        //封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderTime(order.getOrderTime())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .build();

        return orderSubmitVO;
    }

    /**
     * 历史订单查询
     *
     * @param page
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public IPage<OrderVO> pageQuery(int page, int pageSize, Integer status) {
        Page<Orders> pageParam = new Page(page, pageSize);
        //设置分页条件
        OrderPageQueryDTO orderPageQueryDTO = new OrderPageQueryDTO();
        Long userId = BaseContext.getCurrentId();
        String phone = orderPageQueryDTO.getPhone();
        String number = orderPageQueryDTO.getNumber();
        LocalDateTime beginTime = orderPageQueryDTO.getBeginTime();
        LocalDateTime endTime = orderPageQueryDTO.getEndTime();

        IPage<Orders> orderPage = baseMapper.pageQuery(pageParam, number, phone, userId, status, beginTime, endTime);
        List<Orders> orderList = orderPage.getRecords();

        List<OrderVO> orderVOList = new ArrayList();
        IPage<OrderVO> orderVOIPage = new Page<>(page, pageSize);

        // 查询出订单明细，并封装入OrderVO进行响应
        if (!CollectionUtils.isEmpty(orderList)) {
            for (Orders order : orderList) {
                Long orderId = order.getId();// 订单id

                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailService.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(order, orderVO);
                orderVO.setOrderDetailList(orderDetails);
                orderVOList.add(orderVO);
            }
        }
        orderVOIPage.setRecords(orderVOList);
        return orderVOIPage;
    }

    /**
     * 订单支付
     *
     * @param orderPaymentDTO
     * @return
     */
    @Override
    public OrderPaymentVO payment(OrderPaymentDTO orderPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userService.getById(userId);

        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                orderPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
        //跳过微信支付，模拟支付成功
        JSONObject jsonObject = new JSONObject();
        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO orderPaymentVO = jsonObject.toJavaObject(OrderPaymentVO.class);
        orderPaymentVO.setPackageStr(jsonObject.getString("package"));
        paySuccess(orderPaymentDTO.getOrderNumber());
        return orderPaymentVO;
    }

    /***
     * 支付成功，修改订单状态
     * @param orderNumber
     */
    @Override
    public void paySuccess(String orderNumber) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        // 根据订单号查询当前用户的订单
        Orders ordersDB = getByNumberAndUserId(orderNumber, userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(OrderConstant.TO_BE_CONFIRMED);
        orders.setPayStatus(OrderConstant.PAID);
        orders.setCheckoutTime(LocalDateTime.now());

        baseMapper.updateById(orders);

        //通过websocket向客户端浏览器推送消息 type orderId content
        Map map = new HashMap();
        map.put("type",1); // 1表示来单提醒 2表示客户催单
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号：" + orderNumber);

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
    }

    /**
     * 查询订单详情
     *
     * @param id
     * @return
     */
    @Override
    public OrderVO details(Long id) {
        // 根据id查询订单
        Orders orders = baseMapper.selectById(id);

        // 查询该订单对应的菜品/套餐明细
        List<OrderDetail> orderDetailList = orderDetailService.getByOrderId(orders.getId());

        // 将该订单及其详情封装到OrderVO并返回
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;
    }

    /**
     * 用户取消订单
     *
     * @param id
     */
    @Override
    public void userCancelById(Long id) {
        // 根据id查询订单
        Orders ordersDB = baseMapper.selectById(id);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(OrderConstant.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
//            weChatPayUtil.refund(
//                    ordersDB.getNumber(), //商户订单号
//                    ordersDB.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            ordersDB.setPayStatus(OrderConstant.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        ordersDB.setStatus(OrderConstant.CANCELLED);
        ordersDB.setCancelReason("用户取消");
        ordersDB.setCancelTime(LocalDateTime.now());
        baseMapper.updateById(ordersDB);
    }

    /**
     * 再来一单
     *
     * @param id
     */
    @Override
    public void repetition(Long id) {
        // 查询当前用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailService.getByOrderId(id);

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();
            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            return shoppingCart;
        }).collect(Collectors.toList());

        // 将购物车对象批量添加到数据库
        shoppingCartService.saveBatch(shoppingCartList);
    }

    /**
     * 客户催单
     *
     * @param id
     */
    @Override
    public void reminder(Long id) {
        // 根据id查询订单
        Orders ordersDB = baseMapper.selectById(id);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Map map = new HashMap();
        map.put("type",2); //1表示来单提醒 2表示客户催单
        map.put("orderId",id);
        map.put("content","订单号：" + ordersDB.getNumber());

        //通过websocket向客户端浏览器推送消息
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }

    /**
     * 订单条件分页查询
     *
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public IPage<OrderVO> conditionSearch(OrderPageQueryDTO ordersPageQueryDTO) {
        int page = ordersPageQueryDTO.getPage();
        int pageSize = ordersPageQueryDTO.getPageSize();
        Long userId = ordersPageQueryDTO.getUserId();
        String phone = ordersPageQueryDTO.getPhone();
        Integer status = ordersPageQueryDTO.getStatus();
        String number = ordersPageQueryDTO.getNumber();
        LocalDateTime beginTime = ordersPageQueryDTO.getBeginTime();
        LocalDateTime endTime = ordersPageQueryDTO.getEndTime();
        Page pageParam = new Page<>(page, pageSize);
        IPage<Orders> orderPage = baseMapper.pageQuery(pageParam, number, phone, userId, status, beginTime, endTime);

        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(orderPage);
        IPage<OrderVO> orderVOIPage = new Page<>(page, pageSize);
        orderVOIPage.setRecords(orderVOList);
        return orderVOIPage;
    }

    /**
     * 各个状态的订单数量统计
     *
     * @return
     */
    @Override
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = baseMapper.countStatus(OrderConstant.TO_BE_CONFIRMED);
        Integer confirmed = baseMapper.countStatus(OrderConstant.CONFIRMED);
        Integer deliveryInProgress = baseMapper.countStatus(OrderConstant.DELIVERY_IN_PROGRESS);

        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 接单
     *
     * @param ordersConfirmDTO
     */
    @Override
    public void confirm(OrderConfirmDTO ordersConfirmDTO) {
        Orders orders = baseMapper.selectById(ordersConfirmDTO.getId());
        orders.setStatus(OrderConstant.CONFIRMED);

        baseMapper.updateById(orders);
    }

    /**
     * 拒单
     *
     * @param ordersRejectionDTO
     */
    @Override
    public void rejection(OrderRejectionDTO ordersRejectionDTO) {
        // 根据id查询订单
        Orders ordersDB = baseMapper.selectById(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(OrderConstant.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //支付状态
//        Integer payStatus = ordersDB.getPayStatus();
//        if (payStatus == OrderConstant.PAID) {
//            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
//        }

        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(OrderConstant.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        baseMapper.updateById(orders);
    }

    /**
     * 取消订单
     *
     * @param ordersCancelDTO
     */
    @Override
    public void cancel(OrderCancelDTO ordersCancelDTO) {
        //支付状态
//        Integer payStatus = ordersDB.getPayStatus();
//        if (payStatus == 1) {
//            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
//        }

        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(OrderConstant.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        baseMapper.updateById(orders);
    }

    /**
     * 派送订单
     *
     * @param id
     */
    @Override
    public void delivery(Long id) {
        // 根据id查询订单
        Orders ordersDB = baseMapper.selectById(id);

        // 校验订单是否存在，并且状态为3
        if (ordersDB == null || !ordersDB.getStatus().equals(OrderConstant.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        // 更新订单状态,状态转为派送中
        ordersDB.setStatus(OrderConstant.DELIVERY_IN_PROGRESS);

        baseMapper.updateById(ordersDB);
    }

    /**
     * 完成订单
     *
     * @param id
     */
    @Override
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = baseMapper.selectById(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(OrderConstant.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // 更新订单状态,状态转为完成
        ordersDB.setStatus(OrderConstant.COMPLETED);
        ordersDB.setDeliveryTime(LocalDateTime.now());

        baseMapper.updateById(ordersDB);
    }

    /**
     * 根据订单状态和下单时间查询订单
     *
     * @param status
     * @param time
     * @return
     */
    @Override
    public List<Orders> getByStatusAndOrderTimeLT(Integer status, LocalDateTime time) {
        LambdaQueryWrapper<Orders> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(Orders::getStatus, status);
        wrapper.lt(Orders::getOrderTime, time);
        List<Orders> ordersList = baseMapper.selectList(wrapper);
        return ordersList;
    }

    /**
     * 封装OrderVO对象
     *
     * @param page
     * @return
     */
    private List<OrderVO> getOrderVOList(IPage<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getRecords();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 封装订单菜品信息
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailService.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }

    /**
     * 检查用户的收货地址是否超出配送范围
     *
     * @param address
     */
    private void checkOutOfRange(String address) {
        Map map = new HashMap();
        map.put("address", shopAddress);
        map.put("output", "json");
        map.put("ak", ak);

        //获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet(URL, map);

        JSONObject jsonObject = JSON.parseObject(shopCoordinate);
        if (!jsonObject.getString("status").equals("0")) {
            throw new OrderBusinessException(MessageConstant.SHOP_ERROR);
        }

        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");
        String lng = location.getString("lng");
        //店铺经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address", address);
        //获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet(URL, map);

        jsonObject = JSON.parseObject(userCoordinate);
        if (!jsonObject.getString("status").equals("0")) {
            throw new OrderBusinessException(MessageConstant.ADDRESS_ERROR);
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");
        lng = location.getString("lng");
        //用户收货地址经纬度坐标
        String userLngLat = lat + "," + lng;

        map.put("origin", shopLngLat);
        map.put("destination", userLngLat);
        map.put("steps_info", "0");

        //路线规划
        String json = HttpClientUtil.doGet(ROUTE_URL, map);

        jsonObject = JSON.parseObject(json);
        if (!jsonObject.getString("status").equals("0")) {
            throw new OrderBusinessException(MessageConstant.ROUTE_ERROR);
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        if (distance > 5000) {
            //配送距离超过5000米
            throw new OrderBusinessException(MessageConstant.OVER_RANGE);
        }
    }

    /**
     * 根据订单号和用户ID查询订单
     *
     * @param orderNumber
     * @param userId
     * @return
     */
    private Orders getByNumberAndUserId(String orderNumber, Long userId) {
        LambdaQueryWrapper<Orders> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(Orders::getNumber, orderNumber);
        wrapper.eq(Orders::getUserId, userId);
        Orders order = baseMapper.selectOne(wrapper);
        return order;
    }
}
